<template>
  <div class="detail">
    <Header/>
    <div class="main">
      <div class="course-info">
        <div class="wrap-left">
          <!--          <video controls width="100%" src="/static/image/cs1.mp4"></video>-->
          <videoPlayer class="video-player vjs-custom-skin"
                       ref="videoPlayer"
                       :playsinline="true"
                       :options="playerOptions"
                       @play="onPlayerPlay($event)"
                       @pause="onPlayerPause($event)">

          </videoPlayer>

        </div>
        <div class="wrap-right">
          <h3 class="course-name">{{ detail_data.name }}</h3>
          <p class="data">
            {{ detail_data.students }}人在学&nbsp;&nbsp;&nbsp;&nbsp;课程总时长：{{
              detail_data.pub_lessons
            }}课时/{{ detail_data.lessons }}小时&nbsp;&nbsp;&nbsp;&nbsp;难度：{{ detail_data.level_name }}</p>
          <div class="sale-time">
            <p class="sale-type">{{ detail_data.discount_name }}</p>
                        <p class="expire">距离结束：仅剩
                          {{detail_data.activity_left_time/60/60/24 | zhuanint}} 天
                          {{detail_data.activity_left_time/60/60%24 | zhuanint}} 小时
                          {{detail_data.activity_left_time/60%60 | zhuanint}} 分
                          <span class="second">{{detail_data.activity_left_time%60 | zhuanint}}</span> 秒</p>
<!--            <p class="expire">距离结束：仅剩 {{ detail_data.activity_left_time }} 秒</p>-->
          </div>
          <p class="course-price">
            <span>活动价</span>
            <span class="discount">¥{{ detail_data.real_price }}</span>
            <span class="original">¥{{ detail_data.price }}</span>
          </p>
          <div class="buy">
            <div class="buy-btn">
              <button class="buy-now">立即购买</button>
              <button class="free">免费试学</button>
            </div>
            <div class="add-cart" @click="add_cart"><img src="/static/image/cart-yellow.svg" alt="">加入购物车</div>
          </div>
        </div>
      </div>
      <div class="course-tab">
        <ul class="tab-list">
          <li :class="tabIndex==1?'active':''" @click="tabIndex=1">详情介绍</li>
          <li :class="tabIndex==2?'active':''" @click="tabIndex=2">课程章节 <span :class="tabIndex!=2?'free':''">(试学)</span>
          </li>
          <li :class="tabIndex==3?'active':''" @click="tabIndex=3">用户评论 (42)</li>
          <li :class="tabIndex==4?'active':''" @click="tabIndex=4">常见问题</li>
        </ul>
      </div>
      <div class="course-content">
        <div class="course-tab-list">
          <div class="tab-item" v-if="tabIndex==1" v-html="detail_data.join_brief">
            <!--           {{detail_data.brief}}-->
          </div>
          <div class="tab-item" v-if="tabIndex==2">
            <div class="tab-item-title">
              <p class="chapter">课程章节</p>
              <p class="chapter-length">共{{ chapter_data.length }}章 {{ detail_data.pub_lessons }}个课时</p>
            </div>
            <div class="chapter-item" v-for="(chapter_value ,chapter_index) in chapter_data">
              <p class="chapter-title"><img src="/static/image/c19.jpg"
                                            alt="">第{{ chapter_value.chapter }}章·{{ chapter_value.name }}</p>
              <ul class="lesson-list">
                <li class="lesson-item" v-for="(lesson_value ,lesson_index) in chapter_value.coursesections">
                  <p class="name"><span class="index">{{ chapter_value.chapter }}-{{ lesson_value.lesson }}</span>
                    课程介绍-{{ lesson_value.name }}<span class="free" v-if="lesson_value.free_trail">免费</span></p>
                  <p class="time">{{ lesson_value.duration }}<img src="/static/image/chapter-player.svg"></p>
                  <button class="try" v-if="lesson_value.free_trail" ><router-link :to="'/player/'+lesson_value.section_link+'/'">立即试学</router-link></button>
                  <button class="try" v-else>立即购买</button>
                </li>
              </ul>
            </div>
          </div>
          <div class="tab-item" v-if="tabIndex==3">
            用户评论
          </div>
          <div class="tab-item" v-if="tabIndex==4">
            常见问题
          </div>
        </div>
        <div class="course-side">
          <div class="teacher-info">
            <h4 class="side-title"><span>授课老师</span></h4>
            <div class="teacher-content">
              <div class="cont1">
                <img :src="detail_data.teacher.image">
                <div class="name">
                  <p class="teacher-name">{{ detail_data.teacher.name }}</p>
                  <p class="teacher-title">{{ detail_data.teacher.title }}</p>
                </div>
              </div>
              <p class="narrative">{{ detail_data.teacher.brief }}</p>
            </div>
          </div>
        </div>
      </div>
    </div>
    <Footer/>
  </div>
</template>

<script>
import Header from "./common/Header"
import Footer from "./common/Footer"
import {videoPlayer} from 'vue-video-player';

export default {
  name: "CourseDetail",
  data() {
    return {
      course_id: 0,
      tabIndex: 2, // 当前选项卡显示的下标
      detail_data: {
        teacher: {}
      },
      cart_length: 0,
      chapter_data: {},

      playerOptions: {
        playbackRates: [0.7, 1.0, 1.5, 2.0], // 播放速度
        autoplay: false, //如果true,则自动播放
        muted: false, // 默认情况下将会消除任何音频。
        loop: false, // 循环播放
        preload: 'auto',  // 建议浏览器在<video>加载元素后是否应该开始下载视频数据。auto浏览器选择最佳行为,立即开始加载视频（如果浏览器支持）
        language: 'zh-CN',
        aspectRatio: '16:9', // 将播放器置于流畅模式，并在计算播放器的动态大小时使用该值。值应该代表一个比例 - 用冒号分隔的两个数字（例如"16:9"或"4:3"）
        fluid: true, // 当true时，Video.js player将拥有流体大小。换句话说，它将按比例缩放以适应其容器。
        sources: [{ // 播放资源和资源格式
          type: "video/mp4",
          src: "../../static/image/cs1.mp4" //你的视频地址（必填）
        }
        ],
        poster: "../../static/image/c18.jpg", //视频封面图
        width: document.documentElement.clientWidth, // 默认视频全屏时的最大宽度
        notSupportedMessage: '此视频暂无法播放，请稍后再试', //允许覆盖Video.js无法播放媒体源时显示的默认信息。
      }

    }
  },
  //vue过滤器
  filters:{
    zhuanint(val){
      let t = parseInt(val);
      if (t<10){
        t = `0${t}`;
      }
      return t
    },
  },

  created() {

    this.get_course_id();
    this.get_course_detail_data();
    this.get_chapter_data();
    this.daojishi();
  },
  methods: {

    // 添加购物车

    daojishi() {
      let t = setInterval(()=>{
        if (this.detail_data.activity_left_time >1){
          this.detail_data.activity_left_time--;
        }else{
          clearInterval(t);
        }
      }, 1000)
    },

    add_cart() {
      if (localStorage.token) {

        this.token = localStorage.token
        this.where = 1;
      } else if (sessionStorage.token) {
        this.token = sessionStorage.token
        this.where = 0;
      } else {
        this.$message.warning('请先登录')
        return false;

      }
      // this.token = localStorage.token || sessionStorage.token;
      // 异步动作
      this.$axios.post(`${this.$settings.host}/users/verify_token/`, {
        token: this.token,
      })
        .then((res) => {
          // console.log('oooooo')
          if (this.where === 0) {
            sessionStorage.token = res.data.token;
            this.token = res.data.token;
          } else {
            localStorage.token = res.data.token;
            this.token = res.data.token;
          }
          // return res.data.token

          this.$axios.post(`${this.$settings.host}/cart/list/`, {
            course_id: this.course_id,
          }, {
            headers: {  // 添加请求头
              'authorization': `jwt ${this.token}`,
            }
          }).then((res) => {
            this.$message.success(res.data.msg);
            this.cart_length = res.data.cart_len;
            this.$store.commit('add_cart', this.cart_length);
          }).catch((error) => {
            this.$message.error(error.response.data.error)
            this.cart_length = error.response.data.cart_len;
          });

        })
        .catch((error) => {
          this.$confirm('请重新登录', '提示', {
            confirmButtonText: '确定',
            cancelButtonText: '取消',
            type: 'warning'
          }).then(() => {
            this.$router.push('/login');
          }).catch(() => {
            this.token = false;
          })
          return false
        })
      // console.log('xxxxxxx')

    },

    onPlayerPlay() {
      alert('开始播放啦，你先冲会员')
    },
    onPlayerPause() {
      alert('暂停播放啦，看会广告吧')
    },
    // 获取本课程所有章节和课时数据
    get_chapter_data() {
      this.$axios.get(`${this.$settings.host}/course/chapter/`, {
        params: {
          course: this.course_id,
        }
      }).then((res) => {
        this.chapter_data = res.data;

      }).catch((error) => {
        this.$message.error('获取章节信息数据失败')
      })
    },
    // 获取课程详情数据
    get_course_detail_data() {
      this.$axios.get(`${this.$settings.host}/course/detail/${this.course_id}/`)
        .then((res) => {
          this.detail_data = res.data;
        })
        .catch((error) => {
          this.$message.error('数据有误')
        })

    },
    // 获取课程id值
    get_course_id() {

      let course_id = this.$route.params.id;
      let renum = /^\d+$/;

      if (!renum.test(course_id)) {
        this.$router.go(-1);  // 跳转回上一个页面
      }
      this.course_id = course_id;

    },

  },
  components: {
    Header,
    Footer,
    videoPlayer, // 注册组件
  }
}
</script>

<style scoped>
.main {
  background: #fff;
  padding-top: 30px;
}

.course-info {
  width: 1200px;
  margin: 0 auto;
  overflow: hidden;
}

.wrap-left {
  float: left;
  width: 690px;
  height: 388px;
  background-color: #000;
}

.wrap-right {
  float: left;
  position: relative;
  height: 388px;
}

.course-name {
  font-size: 20px;
  color: #333;
  padding: 10px 23px;
  letter-spacing: .45px;
}

.data {
  padding-left: 23px;
  padding-right: 23px;
  padding-bottom: 16px;
  font-size: 14px;
  color: #9b9b9b;
}

.sale-time {
  width: 464px;
  background: #fa6240;
  font-size: 14px;
  color: #4a4a4a;
  padding: 10px 23px;
  overflow: hidden;
}

.sale-type {
  font-size: 16px;
  color: #fff;
  letter-spacing: .36px;
  float: left;
}

.sale-time .expire {
  font-size: 14px;
  color: #fff;
  float: right;
}

.sale-time .expire .second {
  width: 24px;
  display: inline-block;
  background: #fafafa;
  color: #5e5e5e;
  padding: 6px 0;
  text-align: center;
}

.course-price {
  background: #fff;
  font-size: 14px;
  color: #4a4a4a;
  padding: 5px 23px;
}

.discount {
  font-size: 26px;
  color: #fa6240;
  margin-left: 10px;
  display: inline-block;
  margin-bottom: -5px;
}

.original {
  font-size: 14px;
  color: #9b9b9b;
  margin-left: 10px;
  text-decoration: line-through;
}

.buy {
  width: 464px;
  padding: 0px 23px;
  position: absolute;
  left: 0;
  bottom: 20px;
  overflow: hidden;
}

.buy .buy-btn {
  float: left;
}

.buy .buy-now {
  width: 125px;
  height: 40px;
  border: 0;
  background: #ffc210;
  border-radius: 4px;
  color: #fff;
  cursor: pointer;
  margin-right: 15px;
  outline: none;
}

.buy .free {
  width: 125px;
  height: 40px;
  border-radius: 4px;
  cursor: pointer;
  margin-right: 15px;
  background: #fff;
  color: #ffc210;
  border: 1px solid #ffc210;
}

.add-cart {
  float: right;
  font-size: 14px;
  color: #ffc210;
  text-align: center;
  cursor: pointer;
  margin-top: 10px;
}

.add-cart img {
  width: 20px;
  height: 18px;
  margin-right: 7px;
  vertical-align: middle;
}

.course-tab {
  width: 100%;
  background: #fff;
  margin-bottom: 30px;
  box-shadow: 0 2px 4px 0 #f0f0f0;

}

.course-tab .tab-list {
  width: 1200px;
  margin: auto;
  color: #4a4a4a;
  overflow: hidden;
}

.tab-list li {
  float: left;
  margin-right: 15px;
  padding: 26px 20px 16px;
  font-size: 17px;
  cursor: pointer;
}

.tab-list .active {
  color: #ffc210;
  border-bottom: 2px solid #ffc210;
}

.tab-list .free {
  color: #fb7c55;
}

.course-content {
  width: 1200px;
  margin: 0 auto;
  background: #FAFAFA;
  overflow: hidden;
  padding-bottom: 40px;
}

.course-tab-list {
  width: 880px;
  height: auto;
  padding: 20px;
  background: #fff;
  float: left;
  box-sizing: border-box;
  overflow: hidden;
  position: relative;
  box-shadow: 0 2px 4px 0 #f0f0f0;
}

.tab-item {
  width: 880px;
  background: #fff;
  padding-bottom: 20px;
  box-shadow: 0 2px 4px 0 #f0f0f0;
}

.tab-item-title {
  justify-content: space-between;
  padding: 25px 20px 11px;
  border-radius: 4px;
  margin-bottom: 20px;
  border-bottom: 1px solid #333;
  border-bottom-color: rgba(51, 51, 51, .05);
  overflow: hidden;
}

.chapter {
  font-size: 17px;
  color: #4a4a4a;
  float: left;
}

.chapter-length {
  float: right;
  font-size: 14px;
  color: #9b9b9b;
  letter-spacing: .19px;
}

.chapter-title {
  font-size: 16px;
  color: #4a4a4a;
  letter-spacing: .26px;
  padding: 12px;
  background: #eee;
  border-radius: 2px;
  display: -ms-flexbox;
  display: flex;
  -ms-flex-align: center;
  align-items: center;
}

.chapter-title img {
  width: 18px;
  height: 18px;
  margin-right: 7px;
  vertical-align: middle;
}

.lesson-list {
  padding: 0 20px;
}

.lesson-list .lesson-item {
  padding: 15px 20px 15px 36px;
  cursor: pointer;
  justify-content: space-between;
  position: relative;
  overflow: hidden;
}

.lesson-item .name {
  font-size: 14px;
  color: #666;
  float: left;
}

.lesson-item .index {
  margin-right: 5px;
}

.lesson-item .free {
  font-size: 12px;
  color: #fff;
  letter-spacing: .19px;
  background: #ffc210;
  border-radius: 100px;
  padding: 1px 9px;
  margin-left: 10px;
}

.lesson-item .time {
  font-size: 14px;
  color: #666;
  letter-spacing: .23px;
  opacity: 1;
  transition: all .15s ease-in-out;
  float: right;
}

.lesson-item .time img {
  width: 18px;
  height: 18px;
  margin-left: 15px;
  vertical-align: text-bottom;
}

.lesson-item .try {
  width: 86px;
  height: 28px;
  background: #ffc210;
  border-radius: 4px;
  font-size: 14px;
  color: #fff;
  position: absolute;
  right: 20px;
  top: 10px;
  opacity: 0;
  transition: all .2s ease-in-out;
  cursor: pointer;
  outline: none;
  border: none;
}

.lesson-item:hover {
  background: #fcf7ef;
  box-shadow: 0 0 0 0 #f3f3f3;
}

.lesson-item:hover .name {
  color: #333;
}

.lesson-item:hover .try {
  opacity: 1;
}

.course-side {
  width: 300px;
  height: auto;
  margin-left: 20px;
  float: right;
}

.teacher-info {
  background: #fff;
  margin-bottom: 20px;
  box-shadow: 0 2px 4px 0 #f0f0f0;
}

.side-title {
  font-weight: normal;
  font-size: 17px;
  color: #4a4a4a;
  padding: 18px 14px;
  border-bottom: 1px solid #333;
  border-bottom-color: rgba(51, 51, 51, .05);
}

.side-title span {
  display: inline-block;
  border-left: 2px solid #ffc210;
  padding-left: 12px;
}

.teacher-content {
  padding: 30px 20px;
  box-sizing: border-box;
}

.teacher-content .cont1 {
  margin-bottom: 12px;
  overflow: hidden;
}

.teacher-content .cont1 img {
  width: 54px;
  height: 54px;
  margin-right: 12px;
  float: left;
}

.teacher-content .cont1 .name {
  float: right;
}

.teacher-content .cont1 .teacher-name {
  width: 188px;
  font-size: 16px;
  color: #4a4a4a;
  padding-bottom: 4px;
}

.teacher-content .cont1 .teacher-title {
  width: 188px;
  font-size: 13px;
  color: #9b9b9b;
  white-space: nowrap;
}

.teacher-content .narrative {
  font-size: 14px;
  color: #666;
  line-height: 24px;
}
</style>

